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一、前言
二、本自制虚拟键盘特点
三、中文输入原理
四、组合键输入
五、键盘事件模拟
六、界面 七、代码
7.1 frmKeyBoard 头文件代码
7.2 frmKeyBoard 源文件代码
八、使用示例
九、效果
十、结语 一、前言 由于系统自带虚拟键盘不一定好用#xff0c;也不一…目录
一、前言
二、本自制虚拟键盘特点
三、中文输入原理
四、组合键输入
五、键盘事件模拟
六、界面 七、代码
7.1 frmKeyBoard 头文件代码
7.2 frmKeyBoard 源文件代码
八、使用示例
九、效果
十、结语 一、前言 由于系统自带虚拟键盘不一定好用也不一定好看有的按键太小有的电脑上可能没有自带的软键盘干脆直接自己设计一个。 在现代的用户界面设计中屏幕键盘是一种重要的辅助工具特别是在触摸屏设备上。本文将深入解析一个使用Qt框架自制的屏幕键盘具有丰富的功能和用户友好的界面支持中文输入、组合键操作等多种特性。 之前写过一篇不带中文的屏幕键盘本文在该基础上升级部分功能QT自制软键盘 最完美、最简单、跟自带虚拟键盘一样一
二、本自制虚拟键盘特点
1.支持中文输入。
2.支持组合键例如“CtrlC”复制粘贴操作。
3.键盘界面保持在所有界面最上方。
4.点击键盘按钮不会改变底层文本输入框焦点。
5.通过模拟键盘点击事件完成键盘输入文本信息。
6.包含各种键盘自带符号输入。
7.长按按键可以持续重复输入键盘内容。
三、中文输入原理 资源中包含了“PinYin_Chinese.txt”文本文件文件内容为七千多个汉字以及对应的拼音通过加载中文拼音数据实现了基于拼音的中文输入。在用户输入拼音时屏幕键盘匹配对应的汉字词组并显示在候选列表中。 加载中文汉字代码
void frmKeyBoard::loadChineseFontData()
{QFile pinyin(:/PinYin_Chinese.txt);if (!pinyin.open(QIODevice::ReadOnly)) {qDebug() Open pinyin file failed!;return;}while (!pinyin.atEnd()) {QString buf QString::fromUtf8(pinyin.readLine()).trimmed();if (buf.isEmpty())continue;/* 去除#号后的注释内容 */if (buf.left(1) #)continue;bufbuf.replace(\t, );QString pinyin buf.mid(1,buf.size() - 1);QString word buf.mid(0,1);QString abb;QStringList pinyinList pinyin.split( );for (int i 0; i pinyinList.count(); i) {/* 获得拼音词组的首字母(用于缩写匹配) */abb pinyinList.at(i).left(1);}QListQPairQString, QString tmp m_data[pinyin.left(1)];/* 将拼音(缩写)和词组写入匹配容器 */tmp.append(qMakePair(abb, word));/* 将拼音(全拼)和词组写入匹配容器 */tmp.append(qMakePair(pinyin.remove( ), word));}qDebug() m_data.size();pinyin.close();
}
点击列表选择汉字输入
void frmKeyBoard::on_listWidget_itemClicked(QListWidgetItem *item)
{QKeyEvent keyPress(QEvent::KeyPress, 0, m_curModifier, item-text().right(1));QKeyEvent keyRelease(QEvent::KeyRelease, 0, m_curModifier, item-text().right(1));QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);ui.listWidget-clear();m_showTextList.clear();m_curPage 0;m_labelShowPinyin-clear();recordLitterBuf.clear();
} 另外点击汉字对应的数字、点击空格都可以输入汉字点击回车输入对应的英文字母部分关键代码 void frmKeyBoard::slotKeyButtonClicked()
{QPushButton* pbtn (QPushButton*)sender();QString objectName pbtn-objectName();if (pbtn-text().contains(Backspace)) {if(isChinese){if(recordLitterBuf.size() 0){recordLitterBuf.remove(recordLitterBuf.size() - 1, 1);findChineseFontData(recordLitterBuf);if(!m_labelShowPinyin-text().isEmpty())m_labelShowPinyin-setText(recordLitterBuf);}}else{QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Backspace, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Backspace, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}}else if(pbtn-text() Space) {if(isChinese){if(ui.listWidget-count() 0){//按下空格输入列表第一汉字on_listWidget_itemClicked(ui.listWidget-item(0));}}else{QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Space, m_curModifier, );QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Space, m_curModifier, );QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}}else if (pbtn-text().contains(Enter)) { if(isChinese){if(!m_labelShowPinyin-text().isEmpty()){//按下回车输入拼音字母QKeyEvent keyPress(QEvent::KeyPress, 0, m_curModifier, m_labelShowPinyin-text());QKeyEvent keyRelease(QEvent::KeyRelease, 0,m_curModifier, m_labelShowPinyin-text());QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);ui.listWidget-clear();m_showTextList.clear();m_curPage 0;m_labelShowPinyin-clear();recordLitterBuf.clear();}}else{QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Enter, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Enter, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}}else if (pbtn-text().contains(Shift)) {if (pbtn-isChecked()) {isChinese true;m_curModifier Qt::ShiftModifier;for (auto pbtnKey : m_letterKeys) {pbtnKey-setText(pbtnKey-text().toUpper());}}else {isChinese false;ui.listWidget-clear();m_showTextList.clear();m_curPage 0;m_labelShowPinyin-clear();recordLitterBuf.clear();m_curModifier Qt::NoModifier;for (auto pbtnKey : m_letterKeys) {pbtnKey-setText(pbtnKey-text().toLower());}}QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Shift, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Shift, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}
//......else {QString symbol;if (ui.pushButton_shift-isChecked())symbol pbtn-text().split(\n).at(0);elsesymbol pbtn-text().split(\n).at(1);QKeyEvent keyPress(QEvent::KeyPress, m_mapSymbolKeys.value(symbol), m_curModifier, symbol);QKeyEvent keyRelease(QEvent::KeyRelease, m_mapSymbolKeys.value(symbol), m_curModifier, symbol);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}
}四、组合键输入 4.1 定义m_curModifier 记录当前键盘模式。
Qt::KeyboardModifier m_curModifier Qt::NoModifier; 4.2 特殊按键选中时切换对应的按键模式
if (pbtn-text().contains(Ctrl)) {if(pbtn-isChecked())m_curModifier Qt::ControlModifier;elsem_curModifier Qt::NoModifier;QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Control, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Control, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}
五、键盘事件模拟 通过模拟键盘事件实现了对底层文本输入框的模拟输入。这样用户可以在使用屏幕键盘的同时保持对其他界面元素的操作。
QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Enter, m_curModifier);
QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Enter, m_curModifier);
QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);
QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease); 另外通过qApp-focusWidget()获取当前焦点所在的窗口可以将键盘模拟输入到各个窗口的输入框中。
六、界面 界面新增了一个QListWidget用于显示候选汉字列表列表方向从左至右。 七、代码
7.1 frmKeyBoard 头文件代码
#pragma once
#pragma execution_character_set(utf-8)#include QDialog
#include ui_frmKeyBoard.h
#include QPushButton
#include QKeyEvent
#include QDebug
#include QStyle
#include QListWidgetItem
#include QLabel
#include QVBoxLayout
#include QToolTipclass frmKeyBoard : public QDialog
{Q_OBJECTpublic:frmKeyBoard(QWidget *parent nullptr);~frmKeyBoard();void initFocusWidget(QWidget*);private slots:void slotKeyButtonClicked();void slotKeyLetterButtonClicked();void slotKeyNumberButtonClicked();void on_listWidget_itemClicked(QListWidgetItem *item);void on_toolButton_lastPage_clicked();void on_toolButton_nextPage_clicked();private:Ui::frmKeyBoardClass ui;void initFrm();void initStyleSheet();void loadChineseFontData();void findChineseFontData(QString text);void addOneItem(QString text);QMapQString, QListQPairQString, QString m_data;bool isChinese false;QString recordLitterBuf;QVectorQPushButton* m_letterKeys;QVectorQPushButton* m_NumberKeys;QMapQString, Qt::Key m_mapSymbolKeys;QStringList m_showTextList;int m_curPage 0;QLabel* m_labelShowPinyin;Qt::KeyboardModifier m_curModifier Qt::NoModifier;
};7.2 frmKeyBoard 源文件代码
#include frmKeyBoard.hfrmKeyBoard::frmKeyBoard(QWidget *parent): QDialog(parent)
{ui.setupUi(this);this-setWindowFlags(Qt::WindowStaysOnTopHint | Qt::WindowDoesNotAcceptFocus);this-setWindowTitle(屏幕键盘源客V);this-setWindowModality(Qt::WindowModal);this-setAttribute(Qt::WA_DeleteOnClose);this-initFrm();this-initStyleSheet();this-loadChineseFontData();
}frmKeyBoard::~frmKeyBoard()
{
}void frmKeyBoard::initFrm()
{m_letterKeys.clear();m_NumberKeys.clear();QListQPushButton* pbtns this-findChildrenQPushButton*();foreach(QPushButton * pbtn, pbtns) {pbtn-setAutoRepeat(true); //允许自动重复pbtn-setAutoRepeatDelay(500);//设置重复操作的时延if (pbtn-text() a pbtn-text() z) {connect(pbtn, QPushButton::clicked, this, frmKeyBoard::slotKeyLetterButtonClicked);m_letterKeys.push_back(pbtn);}else if (pbtn-text().toInt() 0 pbtn-text().toInt() 9 || pbtn-text() 0) {connect(pbtn, QPushButton::clicked, this, frmKeyBoard::slotKeyNumberButtonClicked);m_NumberKeys.push_back(pbtn);}else{connect(pbtn, QPushButton::clicked, this, frmKeyBoard::slotKeyButtonClicked);}}//添加label显示拼音m_labelShowPinyin new QLabel();QVBoxLayout* vLayout new QVBoxLayout();vLayout-addWidget(m_labelShowPinyin);vLayout-addStretch();ui.listWidget-setLayout(vLayout);m_mapSymbolKeys.insert(~, Qt::Key_AsciiTilde);m_mapSymbolKeys.insert(, Qt::Key_nobreakspace);m_mapSymbolKeys.insert(-, Qt::Key_Minus);m_mapSymbolKeys.insert(_, Qt::Key_Underscore);m_mapSymbolKeys.insert(, Qt::Key_Plus);m_mapSymbolKeys.insert(, Qt::Key_Equal);m_mapSymbolKeys.insert(,, Qt::Key_Comma);m_mapSymbolKeys.insert(., Qt::Key_Period);m_mapSymbolKeys.insert(/, Qt::Key_Slash);m_mapSymbolKeys.insert(, Qt::Key_Less);m_mapSymbolKeys.insert(, Qt::Key_Greater);m_mapSymbolKeys.insert(?, Qt::Key_Question);m_mapSymbolKeys.insert([, Qt::Key_BracketLeft);m_mapSymbolKeys.insert(], Qt::Key_BracketRight);m_mapSymbolKeys.insert({, Qt::Key_BraceLeft);m_mapSymbolKeys.insert(}, Qt::Key_BraceRight);m_mapSymbolKeys.insert(|, Qt::Key_Bar);m_mapSymbolKeys.insert(\\, Qt::Key_Backslash);m_mapSymbolKeys.insert(:, Qt::Key_Colon);m_mapSymbolKeys.insert(;, Qt::Key_Semicolon);m_mapSymbolKeys.insert(\, Qt::Key_QuoteLeft);m_mapSymbolKeys.insert(, Qt::Key_Apostrophe);
}void frmKeyBoard::initStyleSheet()
{QString qss;qss QWidget{ background-color:rgb(26,26,26)}; qss QToolButton{ color:white; font:bold 11pt;};qss QLabel{ color:white; font:13pt;};qss QListWidget{ color:white; border:none; padding-bottom:10px; };qss QListWidget::item:hover,QListWidget::item:selected{font:bold; color:yellow; background-color:rgba(0,0,0,0)};qss QPushButton{ color:white; background-color:rgb(51,51,51); height:50px; font-size:bold 15pt; border:1px solid rgb(26,26,26); border-radius: 0px; min-width:50px;};qss QPushButton:hover{background-color:rgb(229,229,229); color:black;};qss QPushButton:pressed,QPushButton:checked{background-color:rgb(0,118,215);};qss #pushButton_closeKeyboard{background-color:rgba(0,0,0,0); border:0px};qss #pushButton_closeKeyboard:hover{background-color:#b30220;};qss #pushButton_space{min-width:500px;};qss #pushButton_backspace,#pushButton_shift{min-width:100px;};qss #pushButton_enter{min-width:120px;};qss #pushButton_tab,#pushButton_ctrl{min-width:70px;};qss #pushButton_capsLock{min-width:80px;};qss #pushButton_up{min-width:150px;};this-setStyleSheet(qss);
}void frmKeyBoard::loadChineseFontData()
{QFile pinyin(:/PinYin_Chinese.txt);if (!pinyin.open(QIODevice::ReadOnly)) {qDebug() Open pinyin file failed!;return;}while (!pinyin.atEnd()) {QString buf QString::fromUtf8(pinyin.readLine()).trimmed();if (buf.isEmpty())continue;/* 去除#号后的注释内容 */if (buf.left(1) #)continue;bufbuf.replace(\t, );QString pinyin buf.mid(1,buf.size() - 1);QString word buf.mid(0,1);QString abb;QStringList pinyinList pinyin.split( );for (int i 0; i pinyinList.count(); i) {/* 获得拼音词组的首字母(用于缩写匹配) */abb pinyinList.at(i).left(1);}QListQPairQString, QString tmp m_data[pinyin.left(1)];/* 将拼音(缩写)和词组写入匹配容器 */tmp.append(qMakePair(abb, word));/* 将拼音(全拼)和词组写入匹配容器 */tmp.append(qMakePair(pinyin.remove( ), word));}qDebug() m_data.size();pinyin.close();
}void frmKeyBoard::findChineseFontData(QString text)
{QString lowerText text.toLower();m_labelShowPinyin-setText(lowerText);for (int i 0; i ui.listWidget-count(); i) {QListWidgetItem *item ui.listWidget-takeItem(i);delete item;item NULL;}ui.listWidget-clear();m_showTextList.clear();m_curPage 0;if(lowerText.count() 0)return;const QListQPairQString, QString tmp m_data[lowerText.left(1)];bool fond false;for (int i 0; i tmp.count(); i) {const QPairQString, QString each tmp.at(i);if (each.first.left(lowerText.count()) ! lowerText)continue;fond true;addOneItem(each.second);m_showTextList.push_back(each.second);}if(!fond){if(recordLitterBuf.count() 1){recordLitterBuf recordLitterBuf.right(1);findChineseFontData(recordLitterBuf);}else{QKeyEvent keyPress(QEvent::KeyPress, int(recordLitterBuf.at(0).toLatin1()), m_curModifier, recordLitterBuf);QKeyEvent keyRelease(QEvent::KeyRelease, int(recordLitterBuf.at(0).toLatin1()), m_curModifier, recordLitterBuf);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}}
}void frmKeyBoard::addOneItem(QString text)
{if(ui.listWidget-count() 9)return;QString itemText QString(%1.%2).arg(ui.listWidget-count() 1).arg(text);QListWidgetItem *item new QListWidgetItem(itemText);QFont font;font.setPointSize(15);font.setBold(true);font.setWeight(50);item-setFont(font);/* 设置文字居中 */item-setTextAlignment(Qt::AlignBottom | Qt::AlignHCenter);bool isChineseFlag QRegExp(^[\u4E00-\u9FA5]).indexIn(text.left(1)) ! -1;int width font.pointSize();if (isChineseFlag)width itemText.count()*font.pointSize()*1.5;elsewidth itemText.count()*font.pointSize()*2/3;item-setSizeHint(QSize(width, 50));ui.listWidget-addItem(item);
}void frmKeyBoard::slotKeyButtonClicked()
{QPushButton* pbtn (QPushButton*)sender();QString objectName pbtn-objectName();if (pbtn-text().contains(Backspace)) {if(isChinese){if(recordLitterBuf.size() 0){recordLitterBuf.remove(recordLitterBuf.size() - 1, 1);findChineseFontData(recordLitterBuf);if(!m_labelShowPinyin-text().isEmpty())m_labelShowPinyin-setText(recordLitterBuf);}}else{QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Backspace, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Backspace, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}}else if (pbtn-text().contains(Caps)) {if (pbtn-isChecked()) {for (auto pbtnKey : m_letterKeys) {pbtnKey-setText(pbtnKey-text().toUpper());}}else {for (auto pbtnKey : m_letterKeys) {pbtnKey-setText(pbtnKey-text().toLower());}}}else if(pbtn-text() Space) {if(isChinese){if(ui.listWidget-count() 0){on_listWidget_itemClicked(ui.listWidget-item(0));}}else{QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Space, m_curModifier, );QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Space, m_curModifier, );QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}}else if (pbtn-text().contains(Tab)) {QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Tab, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Tab, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}else if (pbtn-text().contains(Enter)) { if(isChinese){if(!m_labelShowPinyin-text().isEmpty()){QKeyEvent keyPress(QEvent::KeyPress, 0, m_curModifier, m_labelShowPinyin-text());QKeyEvent keyRelease(QEvent::KeyRelease, 0,m_curModifier, m_labelShowPinyin-text());QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);ui.listWidget-clear();m_showTextList.clear();m_curPage 0;m_labelShowPinyin-clear();recordLitterBuf.clear();}}else{QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Enter, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Enter, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}}else if (pbtn-text().contains(Shift)) {if (pbtn-isChecked()) {isChinese true;m_curModifier Qt::ShiftModifier;for (auto pbtnKey : m_letterKeys) {pbtnKey-setText(pbtnKey-text().toUpper());}}else {isChinese false;ui.listWidget-clear();m_showTextList.clear();m_curPage 0;m_labelShowPinyin-clear();recordLitterBuf.clear();m_curModifier Qt::NoModifier;for (auto pbtnKey : m_letterKeys) {pbtnKey-setText(pbtnKey-text().toLower());}}QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Shift, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Shift, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}else if (pbtn-text().contains(Ctrl)) {if(pbtn-isChecked())m_curModifier Qt::ControlModifier;elsem_curModifier Qt::NoModifier;QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Control, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Control, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}else if (pbtn-text().contains(Win)) {QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Menu, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Menu, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}else if (pbtn-text().contains(Alt)) {if(pbtn-isChecked())m_curModifier Qt::AltModifier;elsem_curModifier Qt::NoModifier;QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Alt, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Alt, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}else if (pbtn-text().contains(↑)) {QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Up, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Up, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}else if (pbtn-text().contains(↓)) {QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Down, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Down, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}else if (pbtn-text().contains(←)) {QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Left, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Left, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}else if (pbtn-text().contains(→)) {QKeyEvent keyPress(QEvent::KeyPress, Qt::Key_Right, m_curModifier);QKeyEvent keyRelease(QEvent::KeyRelease, Qt::Key_Right, m_curModifier);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}else {QString symbol;if (ui.pushButton_shift-isChecked())symbol pbtn-text().split(\n).at(0);elsesymbol pbtn-text().split(\n).at(1);QKeyEvent keyPress(QEvent::KeyPress, m_mapSymbolKeys.value(symbol), m_curModifier, symbol);QKeyEvent keyRelease(QEvent::KeyRelease, m_mapSymbolKeys.value(symbol), m_curModifier, symbol);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}
}void frmKeyBoard::slotKeyLetterButtonClicked()
{QPushButton* pbtn (QPushButton*)sender();if (pbtn-text() a pbtn-text() z) {if(isChinese){recordLitterBufpbtn-text().toLower();findChineseFontData(recordLitterBuf);}else{ui.listWidget-clear();m_showTextList.clear();m_curPage 0;m_labelShowPinyin-clear();recordLitterBuf.clear();QKeyEvent keyPress(QEvent::KeyPress, int(pbtn-text().at(0).toLatin1()) - 32, m_curModifier, pbtn-text());QKeyEvent keyRelease(QEvent::KeyRelease, int(pbtn-text().at(0).toLatin1()) - 32, m_curModifier, pbtn-text());QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}}else if (pbtn-text() A pbtn-text() Z) {if(isChinese){recordLitterBufpbtn-text().toLower();findChineseFontData(recordLitterBuf);}else{ui.listWidget-clear();m_showTextList.clear();m_curPage 0;m_labelShowPinyin-clear();recordLitterBuf.clear();QKeyEvent keyPress(QEvent::KeyPress, int(pbtn-text().at(0).toLatin1()), m_curModifier, pbtn-text());QKeyEvent keyRelease(QEvent::KeyRelease, int(pbtn-text().at(0).toLatin1()), m_curModifier, pbtn-text());QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);}}if (ui.pushButton_ctrl-isChecked())ui.pushButton_ctrl-setChecked(false);if (ui.pushButton_win-isChecked())ui.pushButton_win-setChecked(false);if (ui.pushButton_alt-isChecked())ui.pushButton_alt-setChecked(false);m_curModifier Qt::NoModifier;
}void frmKeyBoard::slotKeyNumberButtonClicked()
{QPushButton* pbtn (QPushButton*)sender();int num pbtn-text().toInt();if(isChinese){if(num 0 num 9 ui.listWidget-count() num){on_listWidget_itemClicked(ui.listWidget-item(num - 1));}}else {QKeyEvent keyPress(QEvent::KeyPress, num 48, m_curModifier, pbtn-text());QKeyEvent keyRelease(QEvent::KeyRelease, num 48, m_curModifier, pbtn-text());QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);if (ui.pushButton_ctrl-isChecked())ui.pushButton_ctrl-setChecked(false);if (ui.pushButton_win-isChecked())ui.pushButton_win-setChecked(false);if (ui.pushButton_alt-isChecked())ui.pushButton_alt-setChecked(false);}m_curModifier Qt::NoModifier;
}void frmKeyBoard::on_listWidget_itemClicked(QListWidgetItem *item)
{QKeyEvent keyPress(QEvent::KeyPress, 0, m_curModifier, item-text().right(1));QKeyEvent keyRelease(QEvent::KeyRelease, 0, m_curModifier, item-text().right(1));QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyPress);QApplication::sendEvent(qApp-focusWidget() nullptr ? this : qApp-focusWidget(), keyRelease);ui.listWidget-clear();m_showTextList.clear();m_curPage 0;m_labelShowPinyin-clear();recordLitterBuf.clear();
}void frmKeyBoard::on_toolButton_lastPage_clicked()
{if(m_curPage 0)return;m_curPage--;ui.listWidget-clear();for (int i m_curPage * 9; i m_curPage * 9 9; i) {if(i m_showTextList.count())break;addOneItem(m_showTextList.at(i));}
}void frmKeyBoard::on_toolButton_nextPage_clicked()
{if(m_curPage m_showTextList.count() / 9)return;m_curPage;ui.listWidget-clear();for (int i m_curPage * 9; i m_curPage * 9 9; i) {if(i m_showTextList.count())break;addOneItem(m_showTextList.at(i));}
}八、使用示例
MainWindow::MainWindow(QWidget *parent): QMainWindow(parent), ui(new Ui::MainWindow)
{ui-setupUi(this);this-setWindowTitle(屏幕键盘测试源客V);QHBoxLayout* layout new QHBoxLayout();layout-setContentsMargins(0, 0, 0, 0);layout-addWidget(ui-pushButton, 0, Qt::AlignRight);ui-lineEdit-setLayout(layout);
}MainWindow::~MainWindow()
{delete ui;
}void MainWindow::on_pushButton_clicked()
{frmKeyBoard* keyBoard new frmKeyBoard();keyBoard-show();
}九、效果 Qt自制虚拟键盘2支持中文 十、结语 通过深度解析我们更全面地了解了这个使用Qt框架自制的屏幕键盘。其设计理念、功能特点和实现原理展示了在用户界面开发中如何灵活运用Qt框架为用户提供强大而友好的输入方式。对于需要在触摸屏设备上提供良好用户体验的应用这个自制的屏幕键盘提供了一种出色的解决方案。
前序文章QT自制软键盘 最完美、最简单、跟自带虚拟键盘一样一
源码资源Qt自制虚拟键盘(支持中文)
本方案已经能满足屏幕键盘输入的大部分需求了还有不足的地方欢迎大家留言补充。
